Wario has a common disease in Americans called Warioism. Warioism is a disease that makes you fat, gives you a pink nose, strengthens your muscles, get perfect teeth, and for some reason you have the urge to wear the same purple and yellow clothes every single day. Even the clothes you already have have those colors.

Strangely though, he can be skinny, he just chooses to be lazy instead. You can be skinny or you can be lazy. You can't have both.